Vibration dampener for bobbin with an adaptor



Sept. 11, 1956 w. H. MILLER VIBRATION DAMPENERVFOR BOBBIN WITH AN ADAPTOR Filed Oct. 20, 1953 2 Sheets-Sheet 1 Mi WM fil| hul l llllunll mhh r l T IIIM l!| 3 M 3 H: \-t

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INVENTOR. MWIL'LIAM H. MILLER Sept- 11, 1956 w. H. MILLER VIBRATION DAMPENER FOR BOBBIN WITH AN ADAPTOR Filed Oct. 20, 1955 2 Sheets-Sheet 2 FIG;- 9

4 INVENTOR. WILLlAM H. MILLER BY HT TOKNEY nited States Patent VIBRATION DANIPE'NER FOR BOBBIN AN ADAPTOR William H. Miller, Hazleton, 'Pa., assignor to Cloverleaf- Freeland Corporation, Honesdale, Pa., a corporation of Pennsylvania Application October 20, 1953, Serial No. 387,242

9 Claims. (Cl. 241-463) This invention pertains to a vibration dampener used in an arrangement embodying a bobbin and a driving spindle therefor which in the drive between the spindle and the bobbin an adaptor is utilized.

The bobbin and adaptor arrangement in the present invention is similar in many respects to hat disclosed in y p d ng pa n pplication Ser, No- 301.,8.90 tiled July 31, 1952, but the present invention among other things embodies a specific modification of the bottom adaptor of the bobbin appearing in Fig. 4. of said application which adaptor is designed to take up all clearance between the interior of the bobbin barrel and the bottom adaptor when the. bobbin is rotated and to thus eliminate any vibration of the bobbin irrespective of the high speed of rotation to which it may be subjected.

The present invention has all of the objects and advantages of the construction disclosed in the above referred to portion of my copending patent application with the further object of preventin the possibilit of vibrat f the o n when, driv n n th manner disclose in said application.

A f ther obje of th in n on s he provision of a ob ra i n damp-ener which is simple of. construcion. and c para ively cheap o pro uction. ye h g y f ci n opera i l -vv A still fur her objec of the nvention is the Provisi n of novel ea n th ppe adapt r for pr viding a tight c e on be e n th dapt r and he pindle an which d it P oduces a vibrat on ampener on' the spindle.

Another and still further object of the invention is the provision of a bobbin vibration dampener which in addition to being designed for association with adaptors to be made in the future can be associated with adaptors now in use by a slight modification of the adaptors.

The present arrangement is such that it can be used with straight spindles as now commonly constructed by associating with them the adaptors of the present invention or conventional spindle constructions can be modified by making the present improved adaptor constructions an integral part of the spindles.

The many advantages and novel features of the construction will appear from reference to the aforesaid copending patent applications as Well as from the following description when read in the light of the accompanying drawings in which operative embodiments of the inventive concept are illustrated;

In the drawings:

Fig. l is a vertical; sectional view through a. bobbin and showing adaptors embodying the inventive concept associated therewith, the bobbin and; adaptors being mounted on a straight spindle.

Fig. 2 is a vertical sectional view through the upper end of the bobbin of Fig. 1.

Fig. 3 is a vertical sectional view through the lower end of the bobbin of Fig. l and illustrating in vertical section the lower adaptor in the unexpanded; normal position it assumes when the spindle is, idle.

2,762,575 Patented Sept. 11, 1956 Fig. 4 is an enlarged detail view of the lower end of Fig. 1, the bobbin being in vertical section and the adaptor expanded as it is when the spindle is rotated.

Fig. 5 is a top plan view of the lower adaptor in eX- panded position. v I

Fig. 6 is a vertical sectional view through a bobbin having associated therewith another form of dampener carrying lower adaptor, the adaptor being unexpanded. Fig. 7 is a detailed enlarged view of the lower end of Fig. 6, the adaptor dampener being shown in the expanded position it assumes when it along with the spindle is being rotated for driving the bobbin.

Fig. 8 is a vertical sectional view through the bottom adaptor of Fig. 6.

Fig. 9 is a perspective view of the adaptor of Fig. 8.

Fig. 10 is a perspective view of a slightly modified form of adaptor, and

Fig. 11 is a perspective view of a still further modified form of adaptor.

The present application is a continuation-in-part of my copending application Serial No. 271,330, filed October 13, 1952.

In the several forms of the invention illustrated herein parts of the bobbin and spindle are of identical construction and where this occurs like reference numerals and characters are utilized to designate these parts throughout the description and drawings.

Although the bobbin drive illustrated in the accompanying drawings is, with the exception of the vibration dampening means, described in the referred to copending applications, a short description of the drive will be given to obviate the necessity of reference to those applications.

Referring now to the constructions appearing in, Figs. 1 to 5 inclusive, the bobbin or spool comprises an open ended barrel or tube A made of the desired diameter and length for the purpose for which it is intended, and

is provided at each barrel end with heads designated 1 and 2 which can be secured to the barrel in any suitable manner. In the present embodiment the barrel ends are illustrated as being provided with circumferential grooves 3 and 4 which are turned. or spun over at 5 and 6 to secure the heads in position. This manner of securing the barrel heads provides at the barrel ends rounded inner edges 7 and 8.

The barrel at one of its ends, which would be either its upper or outer end when mounted on a spindle, is provided with a cap or ferrule B which is generally cuplike in form to provide a skirt portion 9 and a conical dome-like centrally positioned portion 10 provided centrallywith a passageway 11 which serves as a flyer ferrule.

Attention is directed to the fact that the cap or ferrule isinset in respect to the end of the bobbin barrel so as to provide a surrounding and outwardly extending barrel wall portion 12 beyond the flange of the ferrule. The insetting of the bobbin cap or ferrule is of importance and is provided for a definite and specific reason, which is illustrated and described in my referred to application Serial No. 301,890, but inasmuch as this specific feature forms no part of the present invention further reference thereto is unnecessary.

A plurality of lugs or fingers, two of which 13 and 14 are illustrated, depend downwardly from the ferrule skirt. Although only two are illustrated three are actually provided, but the number could be greater or less if desired.

The bobbin is mounted upon a straight spindle C which is driven bya conventional whorl 15. There is an upper or outer adaptor G and an inner or lower adaptor H. These adaptors are interconnected by a hollow elongated tube 1. which loosely surrounds the spindle. The adaptors can be formed as a part of or suitably secured to the tube. It will be seen that the lower adaptor is. in spaced relationship above the whorl and the upper adaptor is adjacent but inward of the upper or outer end 29 of the spindle.

The bobbin barrel has throughout its length the same interior diameter and both the upper and lower adaptors are of the same diameter and both, like the barrel, are circular in cross sectional configuration. It is highly important to assure that the bobbin can be rapidly and easily mounted on and removed from the adaptors, and accordingly there is a clearance between the outer faces of. the adaptors and the inner face of the barrel. As

bobbins are. rotated at high speeds this clearance can re- .sult in bobbin vibration if provision is not .made to prevent it.

This clearance between the adaptors and the bobbin barrel is not great but is sufficient to cause vibration of the bobbin when it is being rotated. Without exaggeration it would be diificult to illustrate this clearance in the drawings and as the present invention deals primarily with this clearance between the lower adaptor and the barrel the drawings are slightly exaggerated so that the clearance appears at 18. The clearance between the up- .per adaptor and the bobbin barrel is taken care of automatically by the drive connection between the adaptor and the bobbin ferrule or cap as will hereinafter appear.

The upper or outer adaptor G has its side walls cut away to provide three pockets, only two of which appear in the drawings, which are designated 19 and 20.

As will be clear from Fig. 1 the ferrule cap, fingers or lugs '13 and 14 extend downwardly into these pockets and upon rotation of the adaptor wedge themselves between the adaptor and the inner face of the bobbin barrel to simultaneously provide a driving connection between the adaptor and the barrel and by the wedging action provide a tight vibrationless fit between the adaptor and the barrel.

By reason of the spindle extending through the bobbin ferrule or cap the construction serves to act as a positioning means between the bobbin and the adaptor, and additionally it will be seen that the ferrule or cap supports the bobbin on the spindle with the lower or inner end of n the bobbin positioned correctly in respect to the spindle whorl 15- which is quite important as in numerous installations it is essential that this end of the bobbin barrel be spaced a specific or minimum distance above the .whorl. When a bobbin of the proper length is used the inner or lower end thereof will be automatically properly positioned in respect to the whorl.

Broadly the construction thus far described is disclosed :in the referred to copending applications and description will now-be given of the specific construction and arrangement constituting the present invention.

. The lower adaptor H is shaped to provide a head 21 of slightly less diameter than the interior diameter of the bobbin barrel so that the barrel will slip on and oif of the adaptor easily. The adaptor head is provided at one side with an extending tubular stem 22 the lower 1 end of which is at diametrically opposed points provided .with a U-shaped notch 23, only one being shown, the

purpose of which will hereinafter appear. A dampener P which is collar-like in nature telescopically receives the adaptor stem. The dampener is composed of rubber, a rubber compound or some suitable flexible or resilient synthetic material and is retained on the adaptor stem byhaving a contractural elastic-like fit therewith which would be obtained by making the opening in the dampener of slightly less diameter than that of the adaptor stem. The lower end 24 of the dampener collar is flush with the lower end 25 of the adaptor stem. At its periph- A drive connection is provided between the spindle C and the tube carried adaptors by providing a driving connection between the spindle and the adaptor carrying tube I. It is in this drive that the slots or keyways 23 of the adaptor come into play. On its upper face the whorl 15 is provided with a pair of oppositely opposed upwardly extending keys only one, 33, being illustrated, and these enter the keyways 23 of the adaptor and also pass through the slots 27 in the lower end of the dampener collar F. These notches perform dual functions when the invention is practiced. In addition to providing a drive for the bobbin the cut-outs 27 are for the purpose of permitting and facilitating the resilient dampener to flare or balloon out under centrifugal force from the adaptor when it is being revolved by the spindle during the rotative operation of the bobbin.

The operation of the dampener is illustrated in Fig. 4 where slight exaggeration is resorted to for a clearer understanding of the invention. In this figure the bobbin is being rotated and due to centrifugal force the flexible or yieldable dampener collar has in response to centrifugal force flared outwardly at its lower end and in a graduating amount inwardly therefrom so that the dampener fillet 26 engages the inner rounded edge 7 of the bobbin barrel end and also a portion or area of the interior of the barrel end as indicated at 28. It is to be noted that the contour of the fillet preferably follows the contour of the rolled end of the bobbin barrel. When the bobbin is at rest as respects rotation there would be no actual physical contact between the end of the bobbin barrel and the dampener which will permit the referred to necessary ready and easy placement and removal of the bobbin in respect to the adaptors.

It is desirable also toprovide a dampening effect on the spindle where it passes through the upper or outer adaptor G. To provide this the adaptor G is provided internally with a rubber or plastic collar 50 which is bonded, cemented or otherwise suitably secured in place.

Its longitudinal passageway 51 for the spindle is of slightly lesser diameter than the spindle and thus will provide a seizing means between the adaptor and the spindle and simultaneously produce a-vibration dampener on the spindle itself. This collar will automatically accommodate itself to both old and new spindles because of its resiliency. Old spindles at this particular point may be of reduced size due to wear, but the collar 50 will still provide a seizing means even when used with worn spin- By reason of the construction described vibration of the rotating bobbin is virtually eliminated.

A modification of the inventive concept is illustrated in Fig. 6. This particular arrangement has been conceived primarily to take care of straight shipping tubes which have no heads.

Having reference to Fig. 6, the shipping tube K at its upper or outer end is provided with the same ferrule or cap 9 having depending fingers or flanges 13 and 14 which are disposed in the pockets 19 and 20 of the upper or outer adaptor G which is connected to the lower adaptor L by an elongated hollow tube M which loosely surrounds the spindle C which extends upwardly from the whorl 15.

In this particular form of. the invention the lower or inner adaptor L is provided at its outer end with a head 34 and an outwardly extending stem 35 about which is secured through resilient tension the dampener N. The adaptor head is provided with opposed keyways, one only 36 being illustrated, which receive the whorl carried keys 33. To facilitate the expansion or ballooning of the free end 37 of the dampener it is provided with oppositely positioned V-shaped cutouts 38, only one of which is illustrated.

In the form of the invention immediately above described it will be seen that the dampener is aifixed to the opposite end of the adaptor as respects the previously described forms of the invention. The fillet has been eliminated from the dampener but the operation is similar to that heretofore described, as will be clearly seen from Fig. 7, wherein the dampener end expands or balloons outwardly, when the bobbin is rotating, as at 39 to tightly engage the interior of the tube under centrifugal force to eliminate vibration of the tube which would otherwise occur due to the space 40 which exists between the tube end 41 and the adaptor L. A tight fit between the upper and outer adaptor is assured through the driving connection of this adaptor with the adjacent end of the tube in the manner heretofore described in respect to the other forms of the invention.

In any of its forms or uses the cutout slots or grooves in the dampeners can vary as to configuration, as will be aparent from Figs. and 11 wherein in one instance the V-shaped slots are replaced by U-shaped slots 42 and 43 and in the other instance with rectangular shaped slots 44 and 45.

Departures from the specific constructions illustrated and described can be made for the accomplishment of the elimination of vibration during the rotation of the bobbin without departing from the inventive concept, and the invention is accordingly to be limited only by the terms of the hereinafter following claims.

What I claim is:

1. In an arrangement of the character described, a spindle provided with a whorl having upwardly extending keys, an adaptor loosely surrounding the spindle and provided in its bottom with keyways for the reception of the whorl keys to provide a driving connection between the adaptor and the whorl, a bobbin barrel having an open lower end loosely telescopically receiving the adaptor, a dampener associated with the adaptor and comprising a resilient element surrounding and resiliently secured to the lower end of the adaptor and having its lower end terminating substantially flush with the lower end of the adaptor, and the lower end of said resilient element being outwardly flared in respect to the adaptor to form a fillet, and said fillet upon rotation of the adaptor in response to rotation of the spindle expanding outwardly in response to centrifugal force to engage the inner face of the inner open end of the bobbin barrel.

2. A construction as defined in claim 1 wherein, the lower end of the resilient element is provided with cut-out portions in alignment with the keyways of the adaptor to permit passage therethrough of the keys of the whorl and to weaken the lower end of the resilient element to facilitate the expansion of the element in response to centrifugal force.

3. An arrangement of the character described comprising, a spindle provided at its inner end with a driven means for rotating the spindle, an adaptor surrounding and rotatable with the spindle, a bobbin having a tubular barrel one end of which is open, the bobbin barrel having an interior diameter greater than the diameter of the adaptor and loosely telescopically receiving the adaptor, the adaptor embodying a head having a portion of reduced diameter providing a stem extending from one side of the head, a dampener element composed of a resilient material having a central passageway surrounding and tightly secured to the stem, the outer side walls of the head and of the dampener normally lying in the same plane and being out of contact with the inner face of the bobbin barrel wall, the dampener normally having no contact whatsoever with the bobbin, and the dampener upon rotation of the adaptor expanding radially in response to centrifugal force and tightly engaging the inner face of the bobbin barrel wall.

4. A construction as defined in claim 3 wherein, the resilient dampener element carried by the adaptor is secured to an end of said adaptor and is provided with an outwardly extending fillet which upon rotation of the adaptor expands outwardly in response to centrifugal force and engages the inner face of the inner end of the bobbin barrel.

5. A construction as defined in claim 3 wherein, the resilient dampener element carried by the adaptor is in the form of a collar surrounding the inner end of the adaptor, and an end of the collar being provided with oppositely positioned cut-out portions in its inner peripheral edge, to facilitate expansion of the element in response to centrifugal force.

6. A construction as defined in claim 3 wherein, the resilient dampener element carried by the adaptor is in the form of a collar surrounding an end of the adaptor, and an end of the collar being provided with oppositely positioned U-shaped cut-out portions in its peripheral edge to facilitate expansion of the element in response to centrifugal force.

7. A construction as defined in claim 3 wherein, the resilient dampener element carried by the adaptor is in the form of a collar surrounding an end of the adaptor, and an end of the collar being provided with oppositely positioned V-shaped cut-out portions in its peripheral edge to facilitate expansion of the element in response to centrifugal force.

8. A construction as defined in claim 3 wherein, the resilient dampener element carried by the adaptor is in the form of a collar surrounding the inner end of the adaptor, the peripheral edge of an end of the bobbin barrel being rounded, and the resilient element being provided with a fillet having a rounded upper surface of a contour substantially the same as the rounded inner end of the bobbin barrel.

9. In an arrangement of the character described, a spindle adapted to be rotated by a suitable power means, an adaptor surrounding the spindle and rotatable therewith, a dampener element composed of a resilient material surrounding and secured to the adaptor, a bobbin having a tubular barrel one end of which is open, the open end of the bobbin barrel loosely telescopically receiving the adaptor and the dampener carried thereby, the adaptor and the dampener being normally out of contact with the inner face of the bobbin barrel, and the dampener upon rotation of the adaptor expanding radially in response to centrifugal force and tightly engaging the inner face of the bobbin barrel to provide a driving connection between the adaptor and the barrel.

References Cited in the file of this patent UNITED STATES PATENTS 1,975,743 Gollong Oct. 2, 1934 2,136,073 Cooper Nov. 8, 1938 2,668,020 Dunlap Feb. 2, 1954 FOREIGN PATENTS 448,436 Germany Aug. 19, 1927 783,635 France Apr. 8, 1935 

